Kiwi

Decided to make them myself. Cost me about £12 in materials and used the local Men's shed lathe Thanks to everyone who supplied dimensions & details

For the locking tool T1339 can anyone confirm the following details ?? Diameter of the main body ? it looks like 20mm, I assume the 15mm is the diameter of the section with the slot ? Slot is 4mm wide at the inner and 7mm wider at the outer edge ? Thanks Kiwi